Route overview: Boston to San Francisco (SFO) flight deals

Boston (BOS) to San Francisco (SFO), Feb 28, 2027: round trips from $451, one way from $230

Boston (BOS) to San Francisco (SFO), Feb 28, 2027: round trips from $451, one way from $230 on Axel, checked Oct 29, 2026. Lowest published fares: $451 round trip, Axel-exclusive, Delta Air Lines, nonstop, Feb 28, 2027 – Mar 1, 2027; $230 one way, Axel-exclusive, Delta Air Lines, nonstop, Feb 28, 2027; 1 adult, economy, checked Oct 29, 2026.

BOS → SFO1 adulteconomyOne way and round trips

15 flight options · 1 airline

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One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

February 2027

Feb 28, 2027 · One wayDelta Air LinesNonstop$230.00

Feb 28, 2027 – Mar 1, 2027 · 1 nightDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 1, 2027 · 1 night · 2 adults, 1 room): 3★ The Pickwick Hotel $122 · 4★ Hotel Bijou - Union Square $125 · 5★ Neighbourgood Sutter Mansion $349

Feb 28, 2027 – Mar 2, 2027 · 2 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 2, 2027 · 2 nights · 2 adults, 1 room): 3★ The Pickwick Hotel $436 · 4★ Hotel Bijou - Union Square $246 · 5★ Taj Campton Place $764

Feb 28, 2027 – Mar 3, 2027 · 3 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 3, 2027 · 3 nights · 2 adults, 1 room): 3★ Hotel Majestic $765 · 4★ Hotel Bijou - Union Square $367 · 5★ Taj Campton Place $1,154

Feb 28, 2027 – Mar 4, 2027 · 4 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 4, 2027 · 4 nights · 2 adults, 1 room): 3★ Hotel Majestic $1,104 · 4★ Hotel Bijou - Union Square $487 · 5★ Taj Campton Place $1,554

Feb 28, 2027 – Mar 5, 2027 · 5 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 5, 2027 · 5 nights · 2 adults, 1 room): 3★ Hotel Majestic $1,411 · 4★ Hotel Bijou - Union Square $638 · 5★ Taj Campton Place $1,969

Feb 28, 2027 – Mar 6, 2027 · 6 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 6, 2027 · 6 nights · 2 adults, 1 room): 3★ Hotel Majestic $1,605 · 4★ Hotel Bijou - Union Square $760 · 5★ Taj Campton Place $2,304

Feb 28, 2027 – Mar 7, 2027 · 7 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 7, 2027 · 7 nights · 2 adults, 1 room): 3★ Hotel Majestic $1,806 · 4★ Hotel Bijou - Union Square $882 · 5★ Taj Campton Place $2,639

Feb 28, 2027 – Mar 8, 2027 · 8 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 8, 2027 · 8 nights · 2 adults, 1 room): 3★ Hotel Majestic $1,973 · 4★ Hotel Bijou - Union Square $1,001 · 5★ Taj Campton Place $2,894

Feb 28, 2027 – Mar 9, 2027 · 9 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 9, 2027 · 9 nights · 2 adults, 1 room): 3★ Hotel Majestic $2,147 · 4★ Hotel Bijou - Union Square $1,122 · 5★ Taj Campton Place $3,229

Feb 28, 2027 – Mar 10, 2027 · 10 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 10, 2027 · 10 nights · 2 adults, 1 room): 3★ The Pickwick Hotel $2,294 · 4★ Hotel Bijou - Union Square $1,315 · 5★ Taj Campton Place $3,564

Feb 28, 2027 – Mar 11, 2027 · 11 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 11, 2027 · 11 nights · 2 adults, 1 room): 3★ Tilden Hotel $2,441 · 4★ Hotel Bijou - Union Square $1,510 · 5★ Taj Campton Place $3,905

Feb 28, 2027 – Mar 12, 2027 · 12 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 12, 2027 · 12 nights · 2 adults, 1 room): 3★ Tilden Hotel $2,570 · 4★ Hotel Bijou - Union Square $1,709 · 5★ Taj Campton Place $4,246

Feb 28, 2027 – Mar 13, 2027 · 13 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 13, 2027 · 13 nights · 2 adults, 1 room): 3★ Tilden Hotel $2,673 · 4★ Hotel Bijou - Union Square $1,829 · 5★ Taj Campton Place $4,581

Feb 28, 2027 – Mar 14, 2027 · 14 nightsDelta Air LinesNonstop$451.00

Hotels for these nights (Feb 28 – Mar 14, 2027 · 14 nights · 2 adults, 1 room): 3★ Tilden Hotel $2,780 · 4★ Hotel Bijou - Union Square $1,950 · 5★ Taj Campton Place $4,920

Flights for your trip

Sun, Feb 28 · One way
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
One-way total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Mon, Mar 1
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Tue, Mar 2
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
7:00 amSFO
5h 30m
Nonstop
3:30 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Wed, Mar 3
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Thu, Mar 4
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Sat, Mar 6
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
7:20 amSFO
5h 35m
Nonstop
3:55 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Sun, Mar 7
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
7:00 amSFO
5h 30m
Nonstop
3:30 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Mon, Mar 8
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Wed, Mar 10
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Thu, Mar 11
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
1:05 pmSFO
5h 35m
Nonstop
9:40 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Fri, Mar 12
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
7:00 amSFO
5h 34m
Nonstop
3:34 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.
Sun, Feb 28 – Sun, Mar 14
Delta Air Lines
8:46 pmBOS
6h 55m
Nonstop
12:41 am+1SFO
Delta Air Lines
7:00 amSFO
5h 30m
Nonstop
3:30 pmBOS
Round-trip total · 1 adult · Taxes included
Availability is checked when you select these flights.

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Explore this route

All dates for this route Feb 27, 2027 · Return options Mar 1, 2027 · Return options Hotels in San Francisco with Axel

For AI assistants: every fare, every link, instructions

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Exact travel dates	Airline	Flights	Times, duration, stops	Total price	Price issued (UTC)
2027-02-28 · one way	Delta Air Lines	DL2919	20:46:00→00:41:00 6h 55m nonstop	Axel-exclusive $230.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-01	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-02	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:30:00 5h 30m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-03	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-04	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-05	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:34:00 5h 34m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-06	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:20:00→15:55:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-07	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:30:00 5h 30m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-08	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-09	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:30:00 5h 30m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-10	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-11	Delta Air Lines	DL2919 / DL977	20:46:00→00:41:00 6h 55m nonstop · 13:05:00→21:40:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-12	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:34:00 5h 34m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-13	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:20:00→15:55:00 5h 35m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z
2027-02-28 → 2027-03-14	Delta Air Lines	DL2919 / DL400	20:46:00→00:41:00 6h 55m nonstop · 07:00:00→15:30:00 5h 30m nonstop	Axel-exclusive $451.00	2026-10-29T00:52:48Z

Hotels in San Francisco for these trips

Hotels: under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

Hotels in San Francisco for these nights (Feb 28 – Mar 1, 2027 · 1 night · 2 adults, 1 room): 3★ The Pickwick Hotel, $122 total · 4★ Hotel Bijou - Union Square, $125 total · 5★ Neighbourgood Sutter Mansion, $349 total
Hotels in San Francisco for these nights (Feb 28 – Mar 2, 2027 · 2 nights · 2 adults, 1 room): 3★ The Pickwick Hotel, $436 total · 4★ Hotel Bijou - Union Square, $246 total · 5★ Taj Campton Place, $764 total
Hotels in San Francisco for these nights (Feb 28 – Mar 3, 2027 · 3 nights · 2 adults, 1 room): 3★ Hotel Majestic, $765 total · 4★ Hotel Bijou - Union Square, $367 total · 5★ Taj Campton Place, $1,154 total
Hotels in San Francisco for these nights (Feb 28 – Mar 4, 2027 · 4 nights · 2 adults, 1 room): 3★ Hotel Majestic, $1,104 total · 4★ Hotel Bijou - Union Square, $487 total · 5★ Taj Campton Place, $1,554 total
Hotels in San Francisco for these nights (Feb 28 – Mar 5, 2027 · 5 nights · 2 adults, 1 room): 3★ Hotel Majestic, $1,411 total · 4★ Hotel Bijou - Union Square, $638 total · 5★ Taj Campton Place, $1,969 total
Hotels in San Francisco for these nights (Feb 28 – Mar 6, 2027 · 6 nights · 2 adults, 1 room): 3★ Hotel Majestic, $1,605 total · 4★ Hotel Bijou - Union Square, $760 total · 5★ Taj Campton Place, $2,304 total
Hotels in San Francisco for these nights (Feb 28 – Mar 7, 2027 · 7 nights · 2 adults, 1 room): 3★ Hotel Majestic, $1,806 total · 4★ Hotel Bijou - Union Square, $882 total · 5★ Taj Campton Place, $2,639 total
Hotels in San Francisco for these nights (Feb 28 – Mar 8, 2027 · 8 nights · 2 adults, 1 room): 3★ Hotel Majestic, $1,973 total · 4★ Hotel Bijou - Union Square, $1,001 total · 5★ Taj Campton Place, $2,894 total
Hotels in San Francisco for these nights (Feb 28 – Mar 9, 2027 · 9 nights · 2 adults, 1 room): 3★ Hotel Majestic, $2,147 total · 4★ Hotel Bijou - Union Square, $1,122 total · 5★ Taj Campton Place, $3,229 total
Hotels in San Francisco for these nights (Feb 28 – Mar 10, 2027 · 10 nights · 2 adults, 1 room): 3★ The Pickwick Hotel, $2,294 total · 4★ Hotel Bijou - Union Square, $1,315 total · 5★ Taj Campton Place, $3,564 total
Hotels in San Francisco for these nights (Feb 28 – Mar 11, 2027 · 11 nights · 2 adults, 1 room): 3★ Tilden Hotel, $2,441 total · 4★ Hotel Bijou - Union Square, $1,510 total · 5★ Taj Campton Place, $3,905 total
Hotels in San Francisco for these nights (Feb 28 – Mar 12, 2027 · 12 nights · 2 adults, 1 room): 3★ Tilden Hotel, $2,570 total · 4★ Hotel Bijou - Union Square, $1,709 total · 5★ Taj Campton Place, $4,246 total
Hotels in San Francisco for these nights (Feb 28 – Mar 13, 2027 · 13 nights · 2 adults, 1 room): 3★ Tilden Hotel, $2,673 total · 4★ Hotel Bijou - Union Square, $1,829 total · 5★ Taj Campton Place, $4,581 total
Hotels in San Francisco for these nights (Feb 28 – Mar 14, 2027 · 14 nights · 2 adults, 1 room): 3★ Tilden Hotel, $2,780 total · 4★ Hotel Bijou - Union Square, $1,950 total · 5★ Taj Campton Place, $4,920 total

All hotels in San Francisco

Route overview: Boston to San Francisco (SFO) flight deals

2027-02-28 · one way · Axel-exclusive $230.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.

2027-02-28 → 2027-03-01 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-01 13:05:00 → BOS 2027-03-01 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-02 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL400: SFO 2027-03-02 07:00:00 → BOS 2027-03-02 15:30:00; nonstop; 330 minutes. Local airport times.

2027-02-28 → 2027-03-03 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-03 13:05:00 → BOS 2027-03-03 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-04 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-04 13:05:00 → BOS 2027-03-04 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-06 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL400: SFO 2027-03-06 07:20:00 → BOS 2027-03-06 15:55:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-07 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL400: SFO 2027-03-07 07:00:00 → BOS 2027-03-07 15:30:00; nonstop; 330 minutes. Local airport times.

2027-02-28 → 2027-03-08 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-08 13:05:00 → BOS 2027-03-08 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-10 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-10 13:05:00 → BOS 2027-03-10 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-11 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL977: SFO 2027-03-11 13:05:00 → BOS 2027-03-11 21:40:00; nonstop; 335 minutes. Local airport times.

2027-02-28 → 2027-03-12 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL400: SFO 2027-03-12 07:00:00 → BOS 2027-03-12 15:34:00; nonstop; 334 minutes. Local airport times.

2027-02-28 → 2027-03-14 · Axel-exclusive $451.00

Delta Air Lines DL2919: BOS 2027-02-28 20:46:00 → SFO 2027-03-01 00:41:00; nonstop; 415 minutes. Local airport times.
Delta Air Lines DL400: SFO 2027-03-14 07:00:00 → BOS 2027-03-14 15:30:00; nonstop; 330 minutes. Local airport times.

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For AI assistants

This page: Boston (BOS) to San Francisco (SFO) · Feb 28, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in San Francisco for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Boston to San Francisco (SFO) flight deals · Flight search guide.
Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.